Updated Saturday 5:45 p.m.
It wouldn't be a holiday weekend in Western Washington without a few showers, and we kicked off our Saturday morning with a quick soaking in the center of Puget Sound. After the morning rain, Seattle brightened up with partly to mostly cloudy skies (read: a few sunbreaks, anyway!), and highs topped out in the low 60s downtown. Average highs are in the middle 60s in late May, so after running quite warm most of the work week, we've cooled down *just* in time for all of the outdoor BBQ's, camping trips and the Folklike Festival at Seattle Center...
Now that the cooler temps are here, they'll stick around for the balance of the long weekend. Cooler onshore flow from the ocean has socked in the beaches with a thick May marine layer, so we'll hang on to clouds, drizzle, and highs in the 50 from Forks to Long Beach on Sunday and Monday. In the interior, look for more of what we had on Saturday--mainly cloudy skies, a few stray showers, and highs mainly in the low to middle 60s along the I-5 corridor. In the mountainous terrain, look for a few stray thundershowers, as some of the lightning action spinning around a low and into Wenatchee and Yakima this weekend may occasionally roll all the way over the passes.
Naturally, we'll start to warm and brighten as we head back to work and school next week. Building high pressure will allow us to hit the 70s by Wednesday, though onshore flow near the ocean beaches will keep the marine layer in place near the coast much of the time. The threat for mountain thundershows will continue, with lightning a growing concern as we approach the dry summer months.
Have a happy and safe Memorial Day weekend,
Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team